Pivotable Vehicle Headlight Module with Eccentric Heat Sink Fins
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The integration of light modules with heat sinks in motor vehicle headlights is challenging due to the increased volume required for effective heat dissipation, which complicates their mounting and pivoting within the limited space of the headlight housing, especially when dynamic illumination is needed.
Innovation Solution
A light module design featuring a heat dissipation member with a series of fins that decrease in length from the center to the periphery, allowing for efficient heat exchange while minimizing the overall volume, enabling the module to pivot within a reduced space by truncating the fins' length and incorporating bevels at the junctions to avoid hitting the housing walls.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a heat sink with a heat-dissipating section is incorporated into the LED module to ensure efficient cooling, then heat dissipation performance is improved, but the overall volume of the LED module increases
Solution Approach 1:
The heat sink employs fins of varying lengths rather than uniform fins, creating local quality differences. The fins are longer at the center and shorter at the periphery, optimizing heat dissipation in different zones while reducing the overall volume required for the heat sink structure.
Solution Approach 2:
The invention changes the geometric parameters of the heat sink fins, specifically varying the fin length as a function of radial distance from the center. This parameter variation allows the heat sink to maintain effective heat dissipation performance while occupying less space compared to traditional uniform fin designs.
2Adaptability or versatility
If the LED module is designed to pivot within the headlight housing to dynamically illuminate different parts of the scene, then adaptability is improved, but the space required for mounting increases due to the heat-dissipating section
Solution Approach 1:
The variable-length fin design creates local quality differences in the heat sink structure, with shorter fins at the periphery reducing the mounting space required while maintaining adequate heat dissipation through the longer central fins.
Solution Approach 2:
The invention transitions from a two-dimensional uniform fin structure to a three-dimensional variable fin structure, where fin length varies with radial position. This dimensional change allows the heat sink to pivot within a smaller envelope volume while maintaining thermal performance.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This design reduces the space required for the light module's integration and facilitates its pivoting around multiple axes, allowing for compact and efficient heat dissipation within the headlight housing, thereby enhancing the module's mobility and reducing the headlight's overall size.
Implementation Method 1
a heat sink configured to dissipate heat generated by the light source, the heat sink comprising at least one base arranged to capture heat generated by the light source
Implementation Method 2
a dissipation element arranged to dissipate heat captured by the base outside the light module
Data Source
Figure 1~6
Figure 2~3
Figure 4~5
AI summary
A light module (1) comprises at least one heat sink (3) configured to dissipate heat generated by a light source, the heat sink comprising at least one base (4) and one dissipation element (12), the dissipation element comprising a series of fins (14) projecting from the base, each fin being defined by a vertex (15) that defines the length of that fin, and by two end edges (16) extending between said vertex and said base. The light module is configured to pivot about two pivot axes (A1, A2), and the series of fins has eccentric fins whose length is less than the length of the fins (14) present at the center of the dissipation element, at least one fin also having at least one bevel (17) at the junction between the vertex (15) and an end edge (16).